#include <debug.h>
#undef DbgPrint
-/* Base Addres of Kernel in Physical Memory */
-#define KERNEL_BASE_PHYS 0x200000
-
-/* Bits to shift to convert a Virtual Address into an Offset in the Page Table */
-#define PFN_SHIFT 12
-
-/* Bits to shift to convert a Virtual Address into an Offset in the Page Directory */
-#define PDE_SHIFT 22
-#define PDE_SHIFT_PAE 18
-
-
-/* Converts a Relative Address read from the Kernel into a Physical Address */
-#define RaToPa(p) \
- (ULONG_PTR)((ULONG_PTR)p + KERNEL_BASE_PHYS)
-
-/* Converts a Physical Address Pointer into a Page Frame Number */
-#define PaPtrToPfn(p) \
- (((ULONG_PTR)&p) >> PFN_SHIFT)
-
-/* Converts a Physical Address into a Page Frame Number */
-#define PaToPfn(p) \
- ((p) >> PFN_SHIFT)
-
-#define STARTUP_BASE 0xC0000000
-#define HYPERSPACE_BASE 0xC0400000
-#define HYPERSPACE_PAE_BASE 0xC0800000
-#define APIC_BASE 0xFEC00000
-#define KPCR_BASE 0xFF000000
-
-#define LowMemPageTableIndex 0
-#define StartupPageTableIndex (STARTUP_BASE >> 22)
-#define HyperspacePageTableIndex (HYPERSPACE_BASE >> 22)
-#define KpcrPageTableIndex (KPCR_BASE >> 22)
-#define ApicPageTableIndex (APIC_BASE >> 22)
-
-#define LowMemPageTableIndexPae 0
-#define StartupPageTableIndexPae (STARTUP_BASE >> 21)
-#define HyperspacePageTableIndexPae (HYPERSPACE_PAE_BASE >> 21)
-#define KpcrPageTableIndexPae (KPCR_BASE >> 21)
-#define ApicPageTableIndexPae (APIC_BASE >> 21)
-
-
-#define KernelEntryPoint (KernelEntry - KERNEL_BASE_PHYS) + KernelBase
-
-/* Load Address of Next Module */
-ULONG_PTR NextModuleBase = 0;
-
-/* Currently Opened Module */
-PLOADER_MODULE CurrentModule = NULL;
-
-/* Unrelocated Kernel Base in Virtual Memory */
-ULONG_PTR KernelBase;
-
-/* Whether PAE is to be used or not */
-BOOLEAN PaeModeEnabled;
-
-/* Kernel Entrypoint in Physical Memory */
-ULONG_PTR KernelEntry;
-
-typedef struct _HARDWARE_PTE_X64 {
- ULONG Valid : 1;
- ULONG Write : 1;
- ULONG Owner : 1;
- ULONG WriteThrough : 1;
- ULONG CacheDisable : 1;
- ULONG Accessed : 1;
- ULONG Dirty : 1;
- ULONG LargePage : 1;
- ULONG Global : 1;
- ULONG CopyOnWrite : 1;
- ULONG Prototype : 1;
- ULONG reserved : 1;
- ULONG PageFrameNumber : 20;
- ULONG reserved2 : 31;
- ULONG NoExecute : 1;
-} HARDWARE_PTE_X64, *PHARDWARE_PTE_X64;
-
-typedef struct _PAGE_DIRECTORY_X86 {
- HARDWARE_PTE Pde[1024];
-} PAGE_DIRECTORY_X86, *PPAGE_DIRECTORY_X86;
-
-typedef struct _PAGE_DIRECTORY_X64 {
- HARDWARE_PTE_X64 Pde[2048];
-} PAGE_DIRECTORY_X64, *PPAGE_DIRECTORY_X64;
-
-typedef struct _PAGE_DIRECTORY_TABLE_X64 {
- HARDWARE_PTE_X64 Pde[4];
-} PAGE_DIRECTORY_TABLE_X64, *PPAGE_DIRECTORY_TABLE_X64;
-
/* Page Directory and Tables for non-PAE Systems */
extern PAGE_DIRECTORY_X86 startup_pagedirectory;
extern PAGE_DIRECTORY_X86 lowmem_pagetable;
extern PAGE_DIRECTORY_X86 kernel_pagetable;
-extern ULONG_PTR hyperspace_pagetable;
-extern ULONG_PTR _pae_pagedirtable;
+extern PAGE_DIRECTORY_X86 hyperspace_pagetable;
extern PAGE_DIRECTORY_X86 apic_pagetable;
extern PAGE_DIRECTORY_X86 kpcr_pagetable;
-
-/* Page Directory and Tables for PAE Systems */
-extern PAGE_DIRECTORY_TABLE_X64 startup_pagedirectorytable_pae;
-extern PAGE_DIRECTORY_X64 startup_pagedirectory_pae;
-extern PAGE_DIRECTORY_X64 lowmem_pagetable_pae;
-extern PAGE_DIRECTORY_X64 kernel_pagetable_pae;
-extern ULONG_PTR hyperspace_pagetable_pae;
-extern ULONG_PTR pagedirtable_pae;
-extern PAGE_DIRECTORY_X64 apic_pagetable_pae;
-extern PAGE_DIRECTORY_X64 kpcr_pagetable_pae;
-
-BOOLEAN
-NTAPI
-FrLdrLoadImage(IN PCHAR szFileName,
- IN INT nPos);
-
+extern PAGE_DIRECTORY_X86 kuser_pagetable;
+extern ULONG_PTR KernelBase;
+extern ROS_KERNEL_ENTRY_POINT KernelEntryPoint;
/* FUNCTIONS *****************************************************************/
/*++
/* Re-initalize EFLAGS */
Ke386EraseFlags();
- /* Get the PAE Mode */
- FrLdrGetPaeMode();
-
/* Initialize the page directory */
FrLdrSetupPageDirectory();
FrLdrSetupPae(ULONG Magic)
{
ULONG_PTR PageDirectoryBaseAddress = (ULONG_PTR)&startup_pagedirectory;
- ASMCODE PagedJump;
-
- if (PaeModeEnabled)
- {
- PageDirectoryBaseAddress = (ULONG_PTR)&startup_pagedirectorytable_pae;
-
- /* Enable PAE */
- __writecr4(__readcr4() | X86_CR4_PAE);
- }
/* Set the PDBR */
__writecr3(PageDirectoryBaseAddress);
__writecr0(__readcr0() | X86_CR0_PG | X86_CR0_WP);
/* Jump to Kernel */
- PagedJump = (ASMCODE)(PVOID)(KernelEntryPoint);
- PagedJump(Magic, &LoaderBlock);
-}
-
-/*++
- * FrLdrGetKernelBase
- * INTERNAL
- *
- * Gets the Kernel Base to use.
- *
- * Params:
- *
- * Returns:
- * None.
- *
- * Remarks:
- * Sets both the FreeLdr internal variable as well as the one which
- * will be used by the Kernel.
- *
- *--*/
-static VOID
-FASTCALL
-FrLdrGetKernelBase(VOID)
-{
- PCHAR p;
-
- /* Set KernelBase */
- LoaderBlock.KernelBase = KernelBase;
-
- /* Read Command Line */
- p = (PCHAR)LoaderBlock.CommandLine;
- while ((p = strchr(p, '/')) != NULL) {
-
- /* Find "/3GB" */
- if (!_strnicmp(p + 1, "3GB", 3)) {
-
- /* Make sure there's nothing following it */
- if (p[4] == ' ' || p[4] == 0) {
-
- /* Use 3GB */
- KernelBase = 0xE0000000;
- LoaderBlock.KernelBase = 0xC0000000;
- }
- }
-
- p++;
- }
-}
-
-/*++
- * FrLdrGetPaeMode
- * INTERNAL
- *
- * Determines whether PAE mode should be enabled or not.
- *
- * Params:
- * None.
- *
- * Returns:
- * None.
- *
- * Remarks:
- * None.
- *
- *--*/
-VOID
-FASTCALL
-FrLdrGetPaeMode(VOID)
-{
- BOOLEAN PaeModeSupported;
-
- PaeModeSupported = FALSE;
- PaeModeEnabled = FALSE;
-
- if (CpuidSupported() & 1)
- {
- ULONG eax, ebx, ecx, FeatureBits;
- GetCpuid(1, &eax, &ebx, &ecx, &FeatureBits);
- if (FeatureBits & X86_FEATURE_PAE)
- {
- PaeModeSupported = TRUE;
- }
- }
-
- if (PaeModeSupported)
- {
- PCHAR p;
-
- /* Read Command Line */
- p = (PCHAR)LoaderBlock.CommandLine;
- while ((p = strchr(p, '/')) != NULL) {
-
- p++;
- /* Find "PAE" */
- if (!_strnicmp(p, "PAE", 3)) {
-
- /* Make sure there's nothing following it */
- if (p[3] == ' ' || p[3] == 0) {
-
- /* Use Pae */
- PaeModeEnabled = TRUE;
- break;
- }
- }
- }
- }
+ (*KernelEntryPoint)(Magic, &LoaderBlock);
}
/*++
FrLdrSetupPageDirectory(VOID)
{
PPAGE_DIRECTORY_X86 PageDir;
- PPAGE_DIRECTORY_TABLE_X64 PageDirTablePae;
- PPAGE_DIRECTORY_X64 PageDirPae;
ULONG KernelPageTableIndex;
ULONG i;
- if (PaeModeEnabled) {
-
- /* Get the Kernel Table Index */
- KernelPageTableIndex = (KernelBase >> 21);
-
- /* Get the Startup Page Directory Table */
- PageDirTablePae = (PPAGE_DIRECTORY_TABLE_X64)&startup_pagedirectorytable_pae;
-
- /* Get the Startup Page Directory */
- PageDirPae = (PPAGE_DIRECTORY_X64)&startup_pagedirectory_pae;
-
- /* Set the Startup page directory table */
- for (i = 0; i < 4; i++)
- {
- PageDirTablePae->Pde[i].Valid = 1;
- PageDirTablePae->Pde[i].PageFrameNumber = PaPtrToPfn(startup_pagedirectory_pae) + i;
- }
-
- /* Set up the Low Memory PDE */
- for (i = 0; i < 2; i++)
- {
- PageDirPae->Pde[LowMemPageTableIndexPae + i].Valid = 1;
- PageDirPae->Pde[LowMemPageTableIndexPae + i].Write = 1;
- PageDirPae->Pde[LowMemPageTableIndexPae + i].PageFrameNumber = PaPtrToPfn(lowmem_pagetable_pae) + i;
- }
-
- /* Set up the Kernel PDEs */
- for (i = 0; i < 3; i++)
- {
- PageDirPae->Pde[KernelPageTableIndex + i].Valid = 1;
- PageDirPae->Pde[KernelPageTableIndex + i].Write = 1;
- PageDirPae->Pde[KernelPageTableIndex + i].PageFrameNumber = PaPtrToPfn(kernel_pagetable_pae) + i;
- }
-
- /* Set up the Startup PDE */
- for (i = 0; i < 4; i++)
- {
- PageDirPae->Pde[StartupPageTableIndexPae + i].Valid = 1;
- PageDirPae->Pde[StartupPageTableIndexPae + i].Write = 1;
- PageDirPae->Pde[StartupPageTableIndexPae + i].PageFrameNumber = PaPtrToPfn(startup_pagedirectory_pae) + i;
- }
-
- /* Set up the Hyperspace PDE */
- for (i = 0; i < 2; i++)
- {
- PageDirPae->Pde[HyperspacePageTableIndexPae + i].Valid = 1;
- PageDirPae->Pde[HyperspacePageTableIndexPae + i].Write = 1;
- PageDirPae->Pde[HyperspacePageTableIndexPae + i].PageFrameNumber = PaPtrToPfn(hyperspace_pagetable_pae) + i;
- }
-
- /* Set up the Apic PDE */
- for (i = 0; i < 2; i++)
- {
- PageDirPae->Pde[ApicPageTableIndexPae + i].Valid = 1;
- PageDirPae->Pde[ApicPageTableIndexPae + i].Write = 1;
- PageDirPae->Pde[ApicPageTableIndexPae + i].PageFrameNumber = PaPtrToPfn(apic_pagetable_pae) + i;
- }
-
- /* Set up the KPCR PDE */
- PageDirPae->Pde[KpcrPageTableIndexPae].Valid = 1;
- PageDirPae->Pde[KpcrPageTableIndexPae].Write = 1;
- PageDirPae->Pde[KpcrPageTableIndexPae].PageFrameNumber = PaPtrToPfn(kpcr_pagetable_pae);
-
- /* Set up Low Memory PTEs */
- PageDirPae = (PPAGE_DIRECTORY_X64)&lowmem_pagetable_pae;
- for (i=0; i<1024; i++) {
-
- PageDirPae->Pde[i].Valid = 1;
- PageDirPae->Pde[i].Write = 1;
- PageDirPae->Pde[i].Owner = 1;
- PageDirPae->Pde[i].PageFrameNumber = i;
- }
-
- /* Set up Kernel PTEs */
- PageDirPae = (PPAGE_DIRECTORY_X64)&kernel_pagetable_pae;
- for (i=0; i<1536; i++) {
-
- PageDirPae->Pde[i].Valid = 1;
- PageDirPae->Pde[i].Write = 1;
- PageDirPae->Pde[i].PageFrameNumber = PaToPfn(KERNEL_BASE_PHYS) + i;
- }
-
- /* Set up APIC PTEs */
- PageDirPae = (PPAGE_DIRECTORY_X64)&apic_pagetable_pae;
- PageDirPae->Pde[0].Valid = 1;
- PageDirPae->Pde[0].Write = 1;
- PageDirPae->Pde[0].CacheDisable = 1;
- PageDirPae->Pde[0].WriteThrough = 1;
- PageDirPae->Pde[0].PageFrameNumber = PaToPfn(APIC_BASE);
- PageDirPae->Pde[0x200].Valid = 1;
- PageDirPae->Pde[0x200].Write = 1;
- PageDirPae->Pde[0x200].CacheDisable = 1;
- PageDirPae->Pde[0x200].WriteThrough = 1;
- PageDirPae->Pde[0x200].PageFrameNumber = PaToPfn(APIC_BASE + KERNEL_BASE_PHYS);
-
- /* Set up KPCR PTEs */
- PageDirPae = (PPAGE_DIRECTORY_X64)&kpcr_pagetable_pae;
- PageDirPae->Pde[0].Valid = 1;
- PageDirPae->Pde[0].Write = 1;
- PageDirPae->Pde[0].PageFrameNumber = 1;
-
- } else {
-
- /* Get the Kernel Table Index */
- KernelPageTableIndex = KernelBase >> PDE_SHIFT;
-
- /* Get the Startup Page Directory */
- PageDir = (PPAGE_DIRECTORY_X86)&startup_pagedirectory;
-
- /* Set up the Low Memory PDE */
- PageDir->Pde[LowMemPageTableIndex].Valid = 1;
- PageDir->Pde[LowMemPageTableIndex].Write = 1;
- PageDir->Pde[LowMemPageTableIndex].PageFrameNumber = PaPtrToPfn(lowmem_pagetable);
-
- /* Set up the Kernel PDEs */
- PageDir->Pde[KernelPageTableIndex].Valid = 1;
- PageDir->Pde[KernelPageTableIndex].Write = 1;
- PageDir->Pde[KernelPageTableIndex].PageFrameNumber = PaPtrToPfn(kernel_pagetable);
- PageDir->Pde[KernelPageTableIndex + 1].Valid = 1;
- PageDir->Pde[KernelPageTableIndex + 1].Write = 1;
- PageDir->Pde[KernelPageTableIndex + 1].PageFrameNumber = PaPtrToPfn(kernel_pagetable + 4096);
-
- /* Set up the Startup PDE */
- PageDir->Pde[StartupPageTableIndex].Valid = 1;
- PageDir->Pde[StartupPageTableIndex].Write = 1;
- PageDir->Pde[StartupPageTableIndex].PageFrameNumber = PaPtrToPfn(startup_pagedirectory);
-
- /* Set up the Hyperspace PDE */
- PageDir->Pde[HyperspacePageTableIndex].Valid = 1;
- PageDir->Pde[HyperspacePageTableIndex].Write = 1;
- PageDir->Pde[HyperspacePageTableIndex].PageFrameNumber = PaPtrToPfn(hyperspace_pagetable);
-
- /* Set up the Apic PDE */
- PageDir->Pde[ApicPageTableIndex].Valid = 1;
- PageDir->Pde[ApicPageTableIndex].Write = 1;
- PageDir->Pde[ApicPageTableIndex].PageFrameNumber = PaPtrToPfn(apic_pagetable);
-
- /* Set up the KPCR PDE */
- PageDir->Pde[KpcrPageTableIndex].Valid = 1;
- PageDir->Pde[KpcrPageTableIndex].Write = 1;
- PageDir->Pde[KpcrPageTableIndex].PageFrameNumber = PaPtrToPfn(kpcr_pagetable);
-
- /* Set up Low Memory PTEs */
- PageDir = (PPAGE_DIRECTORY_X86)&lowmem_pagetable;
- for (i=0; i<1024; i++) {
-
- PageDir->Pde[i].Valid = 1;
- PageDir->Pde[i].Write = 1;
- PageDir->Pde[i].Owner = 1;
- PageDir->Pde[i].PageFrameNumber = PaToPfn(i * PAGE_SIZE);
- }
-
- /* Set up Kernel PTEs */
- PageDir = (PPAGE_DIRECTORY_X86)&kernel_pagetable;
- for (i=0; i<1536; i++) {
-
- PageDir->Pde[i].Valid = 1;
- PageDir->Pde[i].Write = 1;
- PageDir->Pde[i].PageFrameNumber = PaToPfn(KERNEL_BASE_PHYS + i * PAGE_SIZE);
- }
-
- /* Set up APIC PTEs */
- PageDir = (PPAGE_DIRECTORY_X86)&apic_pagetable;
- PageDir->Pde[0].Valid = 1;
- PageDir->Pde[0].Write = 1;
- PageDir->Pde[0].CacheDisable = 1;
- PageDir->Pde[0].WriteThrough = 1;
- PageDir->Pde[0].PageFrameNumber = PaToPfn(APIC_BASE);
- PageDir->Pde[0x200].Valid = 1;
- PageDir->Pde[0x200].Write = 1;
- PageDir->Pde[0x200].CacheDisable = 1;
- PageDir->Pde[0x200].WriteThrough = 1;
- PageDir->Pde[0x200].PageFrameNumber = PaToPfn(APIC_BASE + KERNEL_BASE_PHYS);
-
- /* Set up KPCR PTEs */
- PageDir = (PPAGE_DIRECTORY_X86)&kpcr_pagetable;
- PageDir->Pde[0].Valid = 1;
- PageDir->Pde[0].Write = 1;
- PageDir->Pde[0].PageFrameNumber = 1;
- }
- return;
-}
-
-PVOID
-NTAPI
-LdrPEGetExportByName(PVOID BaseAddress,
- PUCHAR SymbolName,
- USHORT Hint)
-{
- PIMAGE_EXPORT_DIRECTORY ExportDir;
- PULONG * ExFunctions;
- PULONG * ExNames;
- USHORT * ExOrdinals;
- PVOID ExName;
- ULONG Ordinal;
- PVOID Function;
- LONG minn, maxn, mid, res;
- ULONG ExportDirSize;
-
- /* HAL and NTOS use a virtual address, switch it to physical mode */
- if ((ULONG_PTR)BaseAddress & 0x80000000)
- {
- BaseAddress = (PVOID)((ULONG_PTR)BaseAddress - KSEG0_BASE + 0x200000);
- }
-
- ExportDir = (PIMAGE_EXPORT_DIRECTORY)
- RtlImageDirectoryEntryToData(BaseAddress,
- TRUE,
- IMAGE_DIRECTORY_ENTRY_EXPORT,
- &ExportDirSize);
- if (!ExportDir)
- {
- DbgPrint("LdrPEGetExportByName(): no export directory!\n");
- return NULL;
- }
-
- /* The symbol names may be missing entirely */
- if (!ExportDir->AddressOfNames)
- {
- DbgPrint("LdrPEGetExportByName(): symbol names missing entirely\n");
- return NULL;
- }
-
- /*
- * Get header pointers
- */
- ExNames = (PULONG *)RVA(BaseAddress, ExportDir->AddressOfNames);
- ExOrdinals = (USHORT *)RVA(BaseAddress, ExportDir->AddressOfNameOrdinals);
- ExFunctions = (PULONG *)RVA(BaseAddress, ExportDir->AddressOfFunctions);
-
- /*
- * Check the hint first
- */
- if (Hint < ExportDir->NumberOfNames)
- {
- ExName = RVA(BaseAddress, ExNames[Hint]);
- if (strcmp(ExName, (PCHAR)SymbolName) == 0)
- {
- Ordinal = ExOrdinals[Hint];
- Function = RVA(BaseAddress, ExFunctions[Ordinal]);
- if ((ULONG_PTR)Function >= (ULONG_PTR)ExportDir &&
- (ULONG_PTR)Function < (ULONG_PTR)ExportDir + ExportDirSize)
- {
- Function = NULL;
- if (Function == NULL)
- {
- DbgPrint("LdrPEGetExportByName(): failed to find %s\n",SymbolName);
- }
- return Function;
- }
-
- if (Function != NULL) return Function;
- }
- }
-
- /*
- * Binary search
- */
- minn = 0;
- maxn = ExportDir->NumberOfNames - 1;
- while (minn <= maxn)
- {
- mid = (minn + maxn) / 2;
-
- ExName = RVA(BaseAddress, ExNames[mid]);
- res = strcmp(ExName, (PCHAR)SymbolName);
- if (res == 0)
- {
- Ordinal = ExOrdinals[mid];
- Function = RVA(BaseAddress, ExFunctions[Ordinal]);
- if ((ULONG_PTR)Function >= (ULONG_PTR)ExportDir &&
- (ULONG_PTR)Function < (ULONG_PTR)ExportDir + ExportDirSize)
- {
- Function = NULL;
- if (Function == NULL)
- {
- DbgPrint("LdrPEGetExportByName(): failed to find %s\n",SymbolName);
- }
- return Function;
- }
- if (Function != NULL)
- {
- return Function;
- }
- }
- else if (res > 0)
- {
- maxn = mid - 1;
- }
- else
- {
- minn = mid + 1;
- }
- }
-
- ExName = RVA(BaseAddress, ExNames[mid]);
- DbgPrint("LdrPEGetExportByName(): failed to find %s\n",SymbolName);
- return (PVOID)NULL;
-}
-
-NTSTATUS
-NTAPI
-LdrPEProcessImportDirectoryEntry(PVOID DriverBase,
- PLOADER_MODULE LoaderModule,
- PIMAGE_IMPORT_DESCRIPTOR ImportModuleDirectory)
-{
- PVOID* ImportAddressList;
- PULONG FunctionNameList;
-
- if (ImportModuleDirectory == NULL || ImportModuleDirectory->Name == 0)
- {
- return STATUS_UNSUCCESSFUL;
- }
-
- /* Get the import address list. */
- ImportAddressList = (PVOID*)RVA(DriverBase, ImportModuleDirectory->FirstThunk);
-
- /* Get the list of functions to import. */
- if (ImportModuleDirectory->OriginalFirstThunk != 0)
- {
- FunctionNameList = (PULONG)RVA(DriverBase, ImportModuleDirectory->OriginalFirstThunk);
- }
- else
- {
- FunctionNameList = (PULONG)RVA(DriverBase, ImportModuleDirectory->FirstThunk);
- }
-
- /* Walk through function list and fixup addresses. */
- while (*FunctionNameList != 0L)
- {
- if ((*FunctionNameList) & 0x80000000)
- {
- DbgPrint("Failed to import ordinal from %s\n", LoaderModule->String);
- return STATUS_UNSUCCESSFUL;
- }
- else
- {
- IMAGE_IMPORT_BY_NAME *pe_name;
- pe_name = RVA(DriverBase, *FunctionNameList);
- *ImportAddressList = LdrPEGetExportByName((PVOID)LoaderModule->ModStart, pe_name->Name, pe_name->Hint);
-
- /* Fixup the address to be virtual */
- *ImportAddressList = (PVOID)((ULONG_PTR)*ImportAddressList + (KSEG0_BASE - 0x200000));
-
- //DbgPrint("Looked for: %s and found: %p\n", pe_name->Name, *ImportAddressList);
- if ((*ImportAddressList) == NULL)
- {
- DbgPrint("Failed to import %s from %s\n", pe_name->Name, LoaderModule->String);
- return STATUS_UNSUCCESSFUL;
- }
- }
- ImportAddressList++;
- FunctionNameList++;
- }
- return STATUS_SUCCESS;
-}
-
-PLOADER_MODULE
-NTAPI
-LdrGetModuleObject(PCHAR ModuleName)
-{
- ULONG i;
-
- for (i = 0; i < LoaderBlock.ModsCount; i++)
- {
- if (!_stricmp((PCHAR)reactos_modules[i].String, ModuleName))
- {
- return &reactos_modules[i];
- }
- }
-
- return NULL;
-}
-
-BOOLEAN
-NTAPI
-FrLdrLoadHal(PCHAR szFileName, INT nPos);
-
-NTSTATUS
-NTAPI
-LdrPEGetOrLoadModule(IN PCHAR ModuleName,
- IN PCHAR ImportedName,
- IN PLOADER_MODULE* ImportedModule)
-{
- NTSTATUS Status = STATUS_SUCCESS;
-
- *ImportedModule = LdrGetModuleObject(ImportedName);
- if (*ImportedModule == NULL)
- {
- /*
- * For now, we only support import-loading the HAL.
- * Later, FrLdrLoadDriver should be made to share the same
- * code, and we'll just call it instead.
- */
- if (!_stricmp(ImportedName, "hal.dll") ||
- !_stricmp(ImportedName, "kdcom.dll") ||
- !_stricmp(ImportedName, "bootvid.dll"))
- {
- /* Load the HAL */
- FrLdrLoadImage(ImportedName, 10);
-
- /* Return the new module */
- *ImportedModule = LdrGetModuleObject(ImportedName);
- if (*ImportedModule == NULL)
- {
- DbgPrint("Error loading import: %s\n", ImportedName);
- return STATUS_UNSUCCESSFUL;
- }
- }
- else
- {
- DbgPrint("Don't yet support loading new modules from imports\n");
- Status = STATUS_NOT_IMPLEMENTED;
- }
- }
-
- return Status;
-}
-
-NTSTATUS
-NTAPI
-LdrPEFixupImports(IN PVOID DllBase,
- IN PCHAR DllName)
-{
- PIMAGE_IMPORT_DESCRIPTOR ImportModuleDirectory;
- PCHAR ImportedName;
- NTSTATUS Status;
- PLOADER_MODULE ImportedModule;
- ULONG Size;
-
- /* Process each import module */
- ImportModuleDirectory = (PIMAGE_IMPORT_DESCRIPTOR)
- RtlImageDirectoryEntryToData(DllBase,
- TRUE,
- IMAGE_DIRECTORY_ENTRY_IMPORT,
- &Size);
- while (ImportModuleDirectory->Name)
- {
- /* Check to make sure that import lib is kernel */
- ImportedName = (PCHAR) DllBase + ImportModuleDirectory->Name;
- //DbgPrint("Processing imports for file: %s into file: %s\n", DllName, ImportedName);
-
- Status = LdrPEGetOrLoadModule(DllName, ImportedName, &ImportedModule);
- if (!NT_SUCCESS(Status)) return Status;
-
- //DbgPrint("Import Base: %p\n", ImportedModule->ModStart);
- Status = LdrPEProcessImportDirectoryEntry(DllBase, ImportedModule, ImportModuleDirectory);
- if (!NT_SUCCESS(Status)) return Status;
-
- //DbgPrint("Imports for file: %s into file: %s complete\n", DllName, ImportedName);
- ImportModuleDirectory++;
- }
-
- return STATUS_SUCCESS;
-}
-
-VOID
-NTAPI
-FrLdrReMapImage(IN PIMAGE_NT_HEADERS NtHeader,
- IN PVOID Base)
-{
- PIMAGE_SECTION_HEADER Section;
- ULONG SectionCount, SectionSize;
- PVOID SourceSection, TargetSection;
- INT i;
-
- /* Load the first section */
- Section = IMAGE_FIRST_SECTION(NtHeader);
- SectionCount = NtHeader->FileHeader.NumberOfSections - 1;
-
- /* Now go to the last section */
- Section += SectionCount;
-
- /* Walk each section backwards */
- for (i = SectionCount; i >= 0; i--, Section--)
- {
- /* Get the disk location and the memory location, and the size */
- SourceSection = RVA(Base, Section->PointerToRawData);
- TargetSection = RVA(Base, Section->VirtualAddress);
- SectionSize = Section->SizeOfRawData;
-
- /* If the section is already mapped correctly, go to the next */
- if (SourceSection == TargetSection) continue;
-
- /* Load it into memory */
- RtlMoveMemory(TargetSection, SourceSection, SectionSize);
-
- /* Check for uninitialized data */
- if (Section->SizeOfRawData < Section->Misc.VirtualSize)
- {
- /* Zero it out */
- RtlZeroMemory(RVA(Base, Section->VirtualAddress +
- Section->SizeOfRawData),
- Section->Misc.VirtualSize - Section->SizeOfRawData);
- }
- }
-}
-
-/*++
- * FrLdrMapKernel
- * INTERNAL
- *
- * Maps the Kernel into memory, does PE Section Mapping, initalizes the
- * uninitialized data sections, and relocates the image.
- *
- * Params:
- * KernelImage - FILE Structure representing the ntoskrnl image file.
- *
- * Returns:
- * TRUE if the Kernel was mapped.
- *
- * Remarks:
- * None.
- *
- *--*/
-BOOLEAN
-NTAPI
-FrLdrMapKernel(FILE *KernelImage)
-{
- PIMAGE_NT_HEADERS NtHeader;
- ULONG ImageSize;
- PVOID LoadBase;
-
- /* Set the virtual (image) and physical (load) addresses */
- LoadBase = (PVOID)KERNEL_BASE_PHYS;
-
- /* Load the first 1024 bytes of the kernel image so we can read the PE header */
- if (!FsReadFile(KernelImage, 1024, NULL, LoadBase)) return FALSE;
-
- /* Now read the MZ header to get the offset to the PE Header */
- NtHeader = RtlImageNtHeader(LoadBase);
-
- /* Get Kernel Base */
- KernelBase = NtHeader->OptionalHeader.ImageBase;
- FrLdrGetKernelBase();
-
- /* Save Entrypoint */
- KernelEntry = RaToPa(NtHeader->OptionalHeader.AddressOfEntryPoint);
-
- /* Save the Image Size */
- ImageSize = NtHeader->OptionalHeader.SizeOfImage;
-
- /* Set the file pointer to zero */
- FsSetFilePointer(KernelImage, 0);
-
- /* Load the file image */
- FsReadFile(KernelImage, ImageSize, NULL, LoadBase);
-
- /* Map it */
- FrLdrReMapImage(NtHeader, LoadBase);
-
- /* Calculate Difference between Real Base and Compiled Base*/
- LdrRelocateImageWithBias(LoadBase,
- KernelBase - (ULONG_PTR)LoadBase,
- "FreeLdr",
- STATUS_SUCCESS,
- STATUS_UNSUCCESSFUL,
- STATUS_UNSUCCESSFUL);
-
- /* Fill out Module Data Structure */
- reactos_modules[0].ModStart = KernelBase;
- reactos_modules[0].ModEnd = KernelBase + ImageSize;
- strcpy(reactos_module_strings[0], "ntoskrnl.exe");
- reactos_modules[0].String = (ULONG_PTR)reactos_module_strings[0];
- LoaderBlock.ModsCount++;
-
- /* Increase the next Load Base */
- NextModuleBase = ROUND_UP(LoadBase + ImageSize, PAGE_SIZE);
-
- /* Load the HAL now (name will be changed internally if needed) */
- FrLdrLoadImage("hal.dll", 10);
-
- /* Perform import fixups */
- LdrPEFixupImports(LoadBase, "ntoskrnl.exe");
-
- /* Return Success */
- return TRUE;
+ /* Get the Kernel Table Index */
+ KernelPageTableIndex = KernelBase >> PDE_SHIFT;
+
+ /* Get the Startup Page Directory */
+ PageDir = (PPAGE_DIRECTORY_X86)&startup_pagedirectory;
+
+ /* Set up the Low Memory PDE */
+ PageDir->Pde[LowMemPageTableIndex].Valid = 1;
+ PageDir->Pde[LowMemPageTableIndex].Write = 1;
+ PageDir->Pde[LowMemPageTableIndex].PageFrameNumber = PaPtrToPfn(lowmem_pagetable);
+
+ /* Set up the Kernel PDEs */
+ PageDir->Pde[KernelPageTableIndex].Valid = 1;
+ PageDir->Pde[KernelPageTableIndex].Write = 1;
+ PageDir->Pde[KernelPageTableIndex].PageFrameNumber = PaPtrToPfn(kernel_pagetable);
+ PageDir->Pde[KernelPageTableIndex + 1].Valid = 1;
+ PageDir->Pde[KernelPageTableIndex + 1].Write = 1;
+ PageDir->Pde[KernelPageTableIndex + 1].PageFrameNumber = PaPtrToPfn(kernel_pagetable + 4096);
+
+ /* Set up the Startup PDE */
+ PageDir->Pde[StartupPageTableIndex].Valid = 1;
+ PageDir->Pde[StartupPageTableIndex].Write = 1;
+ PageDir->Pde[StartupPageTableIndex].PageFrameNumber = PaPtrToPfn(startup_pagedirectory);
+
+ /* Set up the Hyperspace PDE */
+ PageDir->Pde[HyperspacePageTableIndex].Valid = 1;
+ PageDir->Pde[HyperspacePageTableIndex].Write = 1;
+ PageDir->Pde[HyperspacePageTableIndex].PageFrameNumber = PaPtrToPfn(hyperspace_pagetable);
+
+ /* Set up the HAL PDE */
+ PageDir->Pde[HalPageTableIndex].Valid = 1;
+ PageDir->Pde[HalPageTableIndex].Write = 1;
+ PageDir->Pde[HalPageTableIndex].PageFrameNumber = PaPtrToPfn(apic_pagetable);
+
+ /* Set up Low Memory PTEs */
+ PageDir = (PPAGE_DIRECTORY_X86)&lowmem_pagetable;
+ for (i=0; i<1024; i++)
+ {
+ PageDir->Pde[i].Valid = 1;
+ PageDir->Pde[i].Write = 1;
+ PageDir->Pde[i].Owner = 1;
+ PageDir->Pde[i].PageFrameNumber = PaToPfn(i * PAGE_SIZE);
+ }
+
+ /* Set up Kernel PTEs */
+ PageDir = (PPAGE_DIRECTORY_X86)&kernel_pagetable;
+ for (i=0; i<1536; i++)
+ {
+ PageDir->Pde[i].Valid = 1;
+ PageDir->Pde[i].Write = 1;
+ PageDir->Pde[i].PageFrameNumber = PaToPfn(KERNEL_BASE_PHYS + i * PAGE_SIZE);
+ }
+
+ /* Setup APIC Base */
+ PageDir = (PPAGE_DIRECTORY_X86)&apic_pagetable;
+ PageDir->Pde[0].Valid = 1;
+ PageDir->Pde[0].Write = 1;
+ PageDir->Pde[0].CacheDisable = 1;
+ PageDir->Pde[0].WriteThrough = 1;
+ PageDir->Pde[0].PageFrameNumber = PaToPfn(HAL_BASE);
+ PageDir->Pde[0x200].Valid = 1;
+ PageDir->Pde[0x200].Write = 1;
+ PageDir->Pde[0x200].CacheDisable = 1;
+ PageDir->Pde[0x200].WriteThrough = 1;
+ PageDir->Pde[0x200].PageFrameNumber = PaToPfn(HAL_BASE + KERNEL_BASE_PHYS);
+
+ /* Setup KUSER_SHARED_DATA Base */
+ PageDir->Pde[0x1F0].Valid = 1;
+ PageDir->Pde[0x1F0].Write = 1;
+ PageDir->Pde[0x1F0].PageFrameNumber = 2;
+
+ /* Setup KPCR Base*/
+ PageDir->Pde[0x1FF].Valid = 1;
+ PageDir->Pde[0x1FF].Write = 1;
+ PageDir->Pde[0x1FF].PageFrameNumber = 1;
}
-BOOLEAN
-NTAPI
-FrLdrMapImage(IN FILE *HalImage,
- IN PCHAR Name)
-{
- PIMAGE_NT_HEADERS NtHeader;
- PVOID ImageBase, LoadBase;
- ULONG ImageSize;
- ULONG ImageId = LoaderBlock.ModsCount;
-
- /* Set the virtual (image) and physical (load) addresses */
- LoadBase = (PVOID)NextModuleBase;
- ImageBase = RVA(LoadBase , -KERNEL_BASE_PHYS + KSEG0_BASE);
-
- /* Load the first 1024 bytes of the HAL image so we can read the PE header */
- if (!FsReadFile(HalImage, 1024, NULL, LoadBase)) return FALSE;
-
- /* Now read the MZ header to get the offset to the PE Header */
- NtHeader = RtlImageNtHeader(LoadBase);
-
- /* Save the Image Size */
- ImageSize = NtHeader->OptionalHeader.SizeOfImage;
-
- /* Set the file pointer to zero */
- FsSetFilePointer(HalImage, 0);
-
- /* Load the file image */
- FsReadFile(HalImage, ImageSize, NULL, LoadBase);
-
- /* Map it into virtual memory */
- FrLdrReMapImage(NtHeader, LoadBase);
-
- /* Calculate Difference between Real Base and Compiled Base*/
- LdrRelocateImageWithBias(LoadBase,
- (ULONG_PTR)ImageBase - (ULONG_PTR)LoadBase,
- "FreeLdr",
- STATUS_SUCCESS,
- STATUS_UNSUCCESSFUL,
- STATUS_UNSUCCESSFUL);
-
- /* Fill out Module Data Structure */
- reactos_modules[ImageId].ModStart = (ULONG_PTR)ImageBase;
- reactos_modules[ImageId].ModEnd = (ULONG_PTR)ImageBase + ImageSize;
- strcpy(reactos_module_strings[ImageId], Name);
- reactos_modules[ImageId].String = (ULONG_PTR)reactos_module_strings[ImageId];
- LoaderBlock.ModsCount++;
-
- /* Increase the next Load Base */
- NextModuleBase = ROUND_UP(NextModuleBase + ImageSize, PAGE_SIZE);
-
- /* Perform import fixups */
- //DbgPrint("Fixing up: %s loaded at: %p\n", Name, ImageBase);
- LdrPEFixupImports(LoadBase, Name);
-
- /* Return Success */
- return TRUE;
-}
-
-ULONG_PTR
-NTAPI
-FrLdrLoadModule(FILE *ModuleImage,
- LPCSTR ModuleName,
- PULONG ModuleSize)
-{
- ULONG LocalModuleSize;
- PLOADER_MODULE ModuleData;
- LPSTR NameBuffer;
- LPSTR TempName;
-
- /* Get current module data structure and module name string array */
- ModuleData = &reactos_modules[LoaderBlock.ModsCount];
-
- /* Get only the Module Name */
- do {
-
- TempName = strchr(ModuleName, '\\');
-
- if(TempName) {
- ModuleName = TempName + 1;
- }
-
- } while(TempName);
- NameBuffer = reactos_module_strings[LoaderBlock.ModsCount];
-
- /* Get Module Size */
- LocalModuleSize = FsGetFileSize(ModuleImage);
-
- /* Fill out Module Data Structure */
- ModuleData->ModStart = NextModuleBase;
- ModuleData->ModEnd = NextModuleBase + LocalModuleSize;
-
- /* Save name */
- strcpy(NameBuffer, ModuleName);
- ModuleData->String = (ULONG_PTR)NameBuffer;
-
- /* Load the file image */
- FsReadFile(ModuleImage, LocalModuleSize, NULL, (PVOID)NextModuleBase);
-
- /* Move to next memory block and increase Module Count */
- NextModuleBase = ROUND_UP(ModuleData->ModEnd, PAGE_SIZE);
- LoaderBlock.ModsCount++;
-// DbgPrint("NextBase, ImageSize, ModStart, ModEnd %p %p %p %p\n",
- // NextModuleBase, LocalModuleSize, ModuleData->ModStart, ModuleData->ModEnd);
-
- /* Return Module Size if required */
- if (ModuleSize != NULL) {
- *ModuleSize = LocalModuleSize;
- }
-
- return(ModuleData->ModStart);
-}
-
-ULONG_PTR
-NTAPI
-FrLdrCreateModule(LPCSTR ModuleName)
-{
- PLOADER_MODULE ModuleData;
- LPSTR NameBuffer;
-
- /* Get current module data structure and module name string array */
- ModuleData = &reactos_modules[LoaderBlock.ModsCount];
- NameBuffer = reactos_module_strings[LoaderBlock.ModsCount];
-
- /* Set up the structure */
- ModuleData->ModStart = NextModuleBase;
- ModuleData->ModEnd = -1;
-
- /* Copy the name */
- strcpy(NameBuffer, ModuleName);
- ModuleData->String = (ULONG_PTR)NameBuffer;
-
- /* Set the current Module */
- CurrentModule = ModuleData;
-
- /* Return Module Base Address */
- return(ModuleData->ModStart);
-}
-
-BOOLEAN
-NTAPI
-FrLdrCloseModule(ULONG_PTR ModuleBase,
- ULONG ModuleSize)
-{
- PLOADER_MODULE ModuleData = CurrentModule;
-
- /* Make sure a module is opened */
- if (ModuleData) {
-
- /* Make sure this is the right module and that it hasn't been closed */
- if ((ModuleBase == ModuleData->ModStart) && (ModuleData->ModEnd == (ULONG_PTR)-1)) {
-
- /* Close the Module */
- ModuleData->ModEnd = ModuleData->ModStart + ModuleSize;
-
- /* Set the next Module Base and increase the number of modules */
- NextModuleBase = ROUND_UP(ModuleData->ModEnd, PAGE_SIZE);
- LoaderBlock.ModsCount++;
-
- /* Close the currently opened module */
- CurrentModule = NULL;
-
- /* Success */
- return(TRUE);
- }
- }
-
- /* Failure path */
- return(FALSE);
-}
projects / reactos.git / blobdiff